1 /* 2 * (C) Copyright 2000 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 /* #define DEBUG */ 25 26 #include <common.h> 27 #include <flash.h> 28 29 #if !defined(CONFIG_SYS_NO_FLASH) 30 31 extern flash_info_t flash_info[]; /* info for FLASH chips */ 32 33 /*----------------------------------------------------------------------- 34 * Functions 35 */ 36 37 /*----------------------------------------------------------------------- 38 * Set protection status for monitor sectors 39 * 40 * The monitor is always located in the _first_ Flash bank. 41 * If necessary you have to map the second bank at lower addresses. 42 */ 43 void 44 flash_protect (int flag, ulong from, ulong to, flash_info_t *info) 45 { 46 ulong b_end; 47 short s_end; 48 int i; 49 50 /* Do nothing if input data is bad. */ 51 if (!info || info->sector_count == 0 || info->size == 0 || to < from) { 52 return; 53 } 54 55 s_end = info->sector_count - 1; /* index of last sector */ 56 b_end = info->start[0] + info->size - 1; /* bank end address */ 57 58 debug ("flash_protect %s: from 0x%08lX to 0x%08lX\n", 59 (flag & FLAG_PROTECT_SET) ? "ON" : 60 (flag & FLAG_PROTECT_CLEAR) ? "OFF" : "???", 61 from, to); 62 63 /* There is nothing to do if we have no data about the flash 64 * or the protect range and flash range don't overlap. 65 */ 66 if (info->flash_id == FLASH_UNKNOWN || 67 to < info->start[0] || from > b_end) { 68 return; 69 } 70 71 for (i=0; i<info->sector_count; ++i) { 72 ulong end; /* last address in current sect */ 73 74 end = (i == s_end) ? b_end : info->start[i + 1] - 1; 75 76 /* Update protection if any part of the sector 77 * is in the specified range. 78 */ 79 if (from <= end && to >= info->start[i]) { 80 if (flag & FLAG_PROTECT_CLEAR) { 81 #if defined(CONFIG_SYS_FLASH_PROTECTION) 82 flash_real_protect(info, i, 0); 83 #else 84 info->protect[i] = 0; 85 #endif /* CONFIG_SYS_FLASH_PROTECTION */ 86 debug ("protect off %d\n", i); 87 } 88 else if (flag & FLAG_PROTECT_SET) { 89 #if defined(CONFIG_SYS_FLASH_PROTECTION) 90 flash_real_protect(info, i, 1); 91 #else 92 info->protect[i] = 1; 93 #endif /* CONFIG_SYS_FLASH_PROTECTION */ 94 debug ("protect on %d\n", i); 95 } 96 } 97 } 98 } 99 100 /*----------------------------------------------------------------------- 101 */ 102 103 flash_info_t * 104 addr2info (ulong addr) 105 { 106 #ifndef CONFIG_SPD823TS 107 flash_info_t *info; 108 int i; 109 110 for (i=0, info = &flash_info[0]; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i, ++info) { 111 if (info->flash_id != FLASH_UNKNOWN && 112 addr >= info->start[0] && 113 /* WARNING - The '- 1' is needed if the flash 114 * is at the end of the address space, since 115 * info->start[0] + info->size wraps back to 0. 116 * Please don't change this unless you understand this. 117 */ 118 addr <= info->start[0] + info->size - 1) { 119 return (info); 120 } 121 } 122 #endif /* CONFIG_SPD823TS */ 123 124 return (NULL); 125 } 126 127 /*----------------------------------------------------------------------- 128 * Copy memory to flash. 129 * Make sure all target addresses are within Flash bounds, 130 * and no protected sectors are hit. 131 * Returns: 132 * ERR_OK 0 - OK 133 * ERR_TIMOUT 1 - write timeout 134 * ERR_NOT_ERASED 2 - Flash not erased 135 * ERR_PROTECTED 4 - target range includes protected sectors 136 * ERR_INVAL 8 - target address not in Flash memory 137 * ERR_ALIGN 16 - target address not aligned on boundary 138 * (only some targets require alignment) 139 */ 140 int 141 flash_write (char *src, ulong addr, ulong cnt) 142 { 143 #ifdef CONFIG_SPD823TS 144 return (ERR_TIMOUT); /* any other error codes are possible as well */ 145 #else 146 int i; 147 ulong end = addr + cnt - 1; 148 flash_info_t *info_first = addr2info (addr); 149 flash_info_t *info_last = addr2info (end ); 150 flash_info_t *info; 151 152 if (cnt == 0) { 153 return (ERR_OK); 154 } 155 156 if (!info_first || !info_last) { 157 return (ERR_INVAL); 158 } 159 160 for (info = info_first; info <= info_last; ++info) { 161 ulong b_end = info->start[0] + info->size; /* bank end addr */ 162 short s_end = info->sector_count - 1; 163 for (i=0; i<info->sector_count; ++i) { 164 ulong e_addr = (i == s_end) ? b_end : info->start[i + 1]; 165 166 if ((end >= info->start[i]) && (addr < e_addr) && 167 (info->protect[i] != 0) ) { 168 return (ERR_PROTECTED); 169 } 170 } 171 } 172 173 /* finally write data to flash */ 174 for (info = info_first; info <= info_last && cnt>0; ++info) { 175 ulong len; 176 177 len = info->start[0] + info->size - addr; 178 if (len > cnt) 179 len = cnt; 180 if ((i = write_buff(info, (uchar *)src, addr, len)) != 0) { 181 return (i); 182 } 183 cnt -= len; 184 addr += len; 185 src += len; 186 } 187 return (ERR_OK); 188 #endif /* CONFIG_SPD823TS */ 189 } 190 191 /*----------------------------------------------------------------------- 192 */ 193 194 void flash_perror (int err) 195 { 196 switch (err) { 197 case ERR_OK: 198 break; 199 case ERR_TIMOUT: 200 puts ("Timeout writing to Flash\n"); 201 break; 202 case ERR_NOT_ERASED: 203 puts ("Flash not Erased\n"); 204 break; 205 case ERR_PROTECTED: 206 puts ("Can't write to protected Flash sectors\n"); 207 break; 208 case ERR_INVAL: 209 puts ("Outside available Flash\n"); 210 break; 211 case ERR_ALIGN: 212 puts ("Start and/or end address not on sector boundary\n"); 213 break; 214 case ERR_UNKNOWN_FLASH_VENDOR: 215 puts ("Unknown Vendor of Flash\n"); 216 break; 217 case ERR_UNKNOWN_FLASH_TYPE: 218 puts ("Unknown Type of Flash\n"); 219 break; 220 case ERR_PROG_ERROR: 221 puts ("General Flash Programming Error\n"); 222 break; 223 default: 224 printf ("%s[%d] FIXME: rc=%d\n", __FILE__, __LINE__, err); 225 break; 226 } 227 } 228 229 /*----------------------------------------------------------------------- 230 */ 231 #endif /* !CONFIG_SYS_NO_FLASH */ 232